Introduction – NEC switch User Manual
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User’s Manual U12978EJ3V0UD
7
INTRODUCTION
Readers
This manual is intended for users who wish to understand the functions of the
µPD789800 Subseries and who design and develop its application systems and
programs.
Target products:
•
µPD789800 Subseries: µPD789800 and µPD78F9801
Purpose
This manual is intended to give users an understanding of the functions described in
the Organization below.
Organization
Two manuals are available for the
µPD789800 Subseries:
This manual and the Instruction Manual (common to the 78K/0S Series).
µPD789800 Subseries
User’s Manual
78K/0S Series
User’s Manual
Instruction
• Pin functions
• Internal block functions
• Interrupts
• Other internal peripheral functions
• Electrical specifications
• CPU function
• Instruction set
• Instruction description
How to Read This Manual
It is assumed that the readers of this manual have general knowledge in the fields of
electrical engineering, logic circuits, and microcontrollers.
• To understand the overall functions of the
µPD789800 Subseries
→ Read this manual in the order of the CONTENTS.
• How to read register formats
→ The name of a bit whose number is enclosed in angle brackets (< >) is reserved
in the assembler and is defined in the C compiler by the header file sfrbit.h.
• To learn the detailed functions of a register whose register name is known
→ See APPENDIX B REGISTER INDEX.
• To learn details of the instruction functions of the 78K/0S Series
→ Refer to 78K/0S Series Instruction User’s Manual (U11047E) separately
available.
• To know the electrical specifications of the
µPD789800 Subseries
→ Refer to CHAPTER 16 ELECTRICAL SPECIFICATIONS.
Conventions
Data significance:
Higher digits on the left and lower digits on the right
Active low representation:
xxx (overscore over pin or signal name)
Note:
Footnote for item marked with Note in the text
Caution:
Information requiring particular attention
Remark:
Supplementary information
Numerical representation:
Binary ... xxxx or xxxxB
Decimal ... xxxx
Hexadecimal ... xxxxH